[openssh-commits] [openssh] 02/05: Import fnmatch.c from OpenBSD.
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commit 59ccb56f15e5e530e7c1b5a0b361749d8c6217d5
Author: Darren Tucker <dtucker at dtucker.net>
Date: Fri Nov 1 17:32:47 2019 +1100
Import fnmatch.c from OpenBSD.
---
openbsd-compat/fnmatch.c | 489 +++++++++++++++++++++++++++++++++++++++++++++++
openbsd-compat/fnmatch.h | 57 ++++++
2 files changed, 546 insertions(+)
diff --git a/openbsd-compat/fnmatch.c b/openbsd-compat/fnmatch.c
new file mode 100644
index 00000000..88d5dbc3
--- /dev/null
+++ b/openbsd-compat/fnmatch.c
@@ -0,0 +1,489 @@
+/* $OpenBSD: fnmatch.c,v 1.21 2016/03/01 20:29:03 millert Exp $ */
+
+/* Copyright (c) 2011, VMware, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the VMware, Inc. nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 2008, 2016 Todd C. Miller <millert at openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* Authored by William A. Rowe Jr. <wrowe; apache.org, vmware.com>, April 2011
+ *
+ * Derived from The Open Group Base Specifications Issue 7, IEEE Std 1003.1-2008
+ * as described in;
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/fnmatch.html
+ *
+ * Filename pattern matches defined in section 2.13, "Pattern Matching Notation"
+ * from chapter 2. "Shell Command Language"
+ * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_13
+ * where; 1. A bracket expression starting with an unquoted <circumflex> '^'
+ * character CONTINUES to specify a non-matching list; 2. an explicit <period> '.'
+ * in a bracket expression matching list, e.g. "[.abc]" does NOT match a leading
+ * <period> in a filename; 3. a <left-square-bracket> '[' which does not introduce
+ * a valid bracket expression is treated as an ordinary character; 4. a differing
+ * number of consecutive slashes within pattern and string will NOT match;
+ * 5. a trailing '\' in FNM_ESCAPE mode is treated as an ordinary '\' character.
+ *
+ * Bracket expansion defined in section 9.3.5, "RE Bracket Expression",
+ * from chapter 9, "Regular Expressions"
+ * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html#tag_09_03_05
+ * with no support for collating symbols, equivalence class expressions or
+ * character class expressions. A partial range expression with a leading
+ * hyphen following a valid range expression will match only the ordinary
+ * <hyphen> and the ending character (e.g. "[a-m-z]" will match characters
+ * 'a' through 'm', a <hyphen> '-', or a 'z').
+ *
+ * Supports BSD extensions FNM_LEADING_DIR to match pattern to the end of one
+ * path segment of string, and FNM_CASEFOLD to ignore alpha case.
+ *
+ * NOTE: Only POSIX/C single byte locales are correctly supported at this time.
+ * Notably, non-POSIX locales with FNM_CASEFOLD produce undefined results,
+ * particularly in ranges of mixed case (e.g. "[A-z]") or spanning alpha and
+ * nonalpha characters within a range.
+ *
+ * XXX comments below indicate porting required for multi-byte character sets
+ * and non-POSIX locale collation orders; requires mbr* APIs to track shift
+ * state of pattern and string (rewinding pattern and string repeatedly).
+ *
+ * Certain parts of the code assume 0x00-0x3F are unique with any MBCS (e.g.
+ * UTF-8, SHIFT-JIS, etc). Any implementation allowing '\' as an alternate
+ * path delimiter must be aware that 0x5C is NOT unique within SHIFT-JIS.
+ */
+
+#include <fnmatch.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "charclass.h"
+
+#define RANGE_MATCH 1
+#define RANGE_NOMATCH 0
+#define RANGE_ERROR (-1)
+
+static int
+classmatch(const char *pattern, char test, int foldcase, const char **ep)
+{
+ const char * const mismatch = pattern;
+ const char *colon;
+ struct cclass *cc;
+ int rval = RANGE_NOMATCH;
+ size_t len;
+
+ if (pattern[0] != '[' || pattern[1] != ':') {
+ *ep = mismatch;
+ return RANGE_ERROR;
+ }
+ pattern += 2;
+
+ if ((colon = strchr(pattern, ':')) == NULL || colon[1] != ']') {
+ *ep = mismatch;
+ return RANGE_ERROR;
+ }
+ *ep = colon + 2;
+ len = (size_t)(colon - pattern);
+
+ if (foldcase && strncmp(pattern, "upper:]", 7) == 0)
+ pattern = "lower:]";
+ for (cc = cclasses; cc->name != NULL; cc++) {
+ if (!strncmp(pattern, cc->name, len) && cc->name[len] == '\0') {
+ if (cc->isctype((unsigned char)test))
+ rval = RANGE_MATCH;
+ break;
+ }
+ }
+ if (cc->name == NULL) {
+ /* invalid character class, treat as normal text */
+ *ep = mismatch;
+ rval = RANGE_ERROR;
+ }
+ return rval;
+}
+
+/* Most MBCS/collation/case issues handled here. Wildcard '*' is not handled.
+ * EOS '\0' and the FNM_PATHNAME '/' delimiters are not advanced over,
+ * however the "\/" sequence is advanced to '/'.
+ *
+ * Both pattern and string are **char to support pointer increment of arbitrary
+ * multibyte characters for the given locale, in a later iteration of this code
+ */
+static int fnmatch_ch(const char **pattern, const char **string, int flags)
+{
+ const char * const mismatch = *pattern;
+ const int nocase = !!(flags & FNM_CASEFOLD);
+ const int escape = !(flags & FNM_NOESCAPE);
+ const int slash = !!(flags & FNM_PATHNAME);
+ int result = FNM_NOMATCH;
+ const char *startch;
+ int negate;
+
+ if (**pattern == '[') {
+ ++*pattern;
+
+ /* Handle negation, either leading ! or ^ operators */
+ negate = (**pattern == '!') || (**pattern == '^');
+ if (negate)
+ ++*pattern;
+
+ /* ']' is an ordinary char at the start of the range pattern */
+ if (**pattern == ']')
+ goto leadingclosebrace;
+
+ while (**pattern) {
+ if (**pattern == ']') {
+ ++*pattern;
+ /* XXX: Fix for MBCS character width */
+ ++*string;
+ return (result ^ negate);
+ }
+
+ if (escape && (**pattern == '\\')) {
+ ++*pattern;
+
+ /* Patterns must terminate with ']', not EOS */
+ if (!**pattern)
+ break;
+ }
+
+ /* Patterns must terminate with ']' not '/' */
+ if (slash && (**pattern == '/'))
+ break;
+
+ /* Match character classes. */
+ switch (classmatch(*pattern, **string, nocase, pattern)) {
+ case RANGE_MATCH:
+ result = 0;
+ continue;
+ case RANGE_NOMATCH:
+ /* Valid character class but no match. */
+ continue;
+ default:
+ /* Not a valid character class. */
+ break;
+ }
+ if (!**pattern)
+ break;
+
+leadingclosebrace:
+ /* Look at only well-formed range patterns;
+ * "x-]" is not allowed unless escaped ("x-\]")
+ * XXX: Fix for locale/MBCS character width
+ */
+ if (((*pattern)[1] == '-') && ((*pattern)[2] != ']')) {
+ startch = *pattern;
+ *pattern += (escape && ((*pattern)[2] == '\\')) ? 3 : 2;
+
+ /*
+ * NOT a properly balanced [expr] pattern, EOS
+ * terminated or ranges containing a slash in
+ * FNM_PATHNAME mode pattern fall out to to the
+ * rewind and test '[' literal code path.
+ */
+ if (!**pattern || (slash && (**pattern == '/')))
+ break;
+
+ /* XXX: handle locale/MBCS comparison, advance by MBCS char width */
+ if ((**string >= *startch) && (**string <= **pattern))
+ result = 0;
+ else if (nocase &&
+ (isupper((unsigned char)**string) ||
+ isupper((unsigned char)*startch) ||
+ isupper((unsigned char)**pattern)) &&
+ (tolower((unsigned char)**string) >=
+ tolower((unsigned char)*startch)) &&
+ (tolower((unsigned char)**string) <=
+ tolower((unsigned char)**pattern)))
+ result = 0;
+
+ ++*pattern;
+ continue;
+ }
+
+ /* XXX: handle locale/MBCS comparison, advance by MBCS char width */
+ if ((**string == **pattern))
+ result = 0;
+ else if (nocase && (isupper((unsigned char)**string) ||
+ isupper((unsigned char)**pattern)) &&
+ (tolower((unsigned char)**string) ==
+ tolower((unsigned char)**pattern)))
+ result = 0;
+
+ ++*pattern;
+ }
+ /*
+ * NOT a properly balanced [expr] pattern;
+ * Rewind and reset result to test '[' literal
+ */
+ *pattern = mismatch;
+ result = FNM_NOMATCH;
+ } else if (**pattern == '?') {
+ /* Optimize '?' match before unescaping **pattern */
+ if (!**string || (slash && (**string == '/')))
+ return FNM_NOMATCH;
+ result = 0;
+ goto fnmatch_ch_success;
+ } else if (escape && (**pattern == '\\') && (*pattern)[1]) {
+ ++*pattern;
+ }
+
+ /* XXX: handle locale/MBCS comparison, advance by the MBCS char width */
+ if (**string == **pattern)
+ result = 0;
+ else if (nocase && (isupper((unsigned char)**string) ||
+ isupper((unsigned char)**pattern)) &&
+ (tolower((unsigned char)**string) ==
+ tolower((unsigned char)**pattern)))
+ result = 0;
+
+ /* Refuse to advance over trailing slash or NULs */
+ if (**string == '\0' || **pattern == '\0' ||
+ (slash && ((**string == '/') || (**pattern == '/'))))
+ return result;
+
+fnmatch_ch_success:
+ ++*pattern;
+ ++*string;
+ return result;
+}
+
+
+int fnmatch(const char *pattern, const char *string, int flags)
+{
+ static const char dummystring[2] = {' ', 0};
+ const int escape = !(flags & FNM_NOESCAPE);
+ const int slash = !!(flags & FNM_PATHNAME);
+ const int leading_dir = !!(flags & FNM_LEADING_DIR);
+ const char *dummyptr, *matchptr, *strendseg;
+ int wild;
+ /* For '*' wild processing only; surpress 'used before initialization'
+ * warnings with dummy initialization values;
+ */
+ const char *strstartseg = NULL;
+ const char *mismatch = NULL;
+ int matchlen = 0;
+
+ if (*pattern == '*')
+ goto firstsegment;
+
+ while (*pattern && *string) {
+ /*
+ * Pre-decode "\/" which has no special significance, and
+ * match balanced slashes, starting a new segment pattern.
+ */
+ if (slash && escape && (*pattern == '\\') && (pattern[1] == '/'))
+ ++pattern;
+ if (slash && (*pattern == '/') && (*string == '/')) {
+ ++pattern;
+ ++string;
+ }
+
+firstsegment:
+ /*
+ * At the beginning of each segment, validate leading period
+ * behavior.
+ */
+ if ((flags & FNM_PERIOD) && (*string == '.')) {
+ if (*pattern == '.')
+ ++pattern;
+ else if (escape && (*pattern == '\\') && (pattern[1] == '.'))
+ pattern += 2;
+ else
+ return FNM_NOMATCH;
+ ++string;
+ }
+
+ /*
+ * Determine the end of string segment. Presumes '/'
+ * character is unique, not composite in any MBCS encoding
+ */
+ if (slash) {
+ strendseg = strchr(string, '/');
+ if (!strendseg)
+ strendseg = strchr(string, '\0');
+ } else {
+ strendseg = strchr(string, '\0');
+ }
+
+ /*
+ * Allow pattern '*' to be consumed even with no remaining
+ * string to match.
+ */
+ while (*pattern) {
+ if ((string > strendseg) ||
+ ((string == strendseg) && (*pattern != '*')))
+ break;
+
+ if (slash && ((*pattern == '/') ||
+ (escape && (*pattern == '\\') && (pattern[1] == '/'))))
+ break;
+
+ /*
+ * Reduce groups of '*' and '?' to n '?' matches
+ * followed by one '*' test for simplicity.
+ */
+ for (wild = 0; (*pattern == '*') || (*pattern == '?'); ++pattern) {
+ if (*pattern == '*') {
+ wild = 1;
+ } else if (string < strendseg) { /* && (*pattern == '?') */
+ /* XXX: Advance 1 char for MBCS locale */
+ ++string;
+ }
+ else { /* (string >= strendseg) && (*pattern == '?') */
+ return FNM_NOMATCH;
+ }
+ }
+
+ if (wild) {
+ strstartseg = string;
+ mismatch = pattern;
+
+ /*
+ * Count fixed (non '*') char matches remaining
+ * in pattern * excluding '/' (or "\/") and '*'.
+ */
+ for (matchptr = pattern, matchlen = 0; 1; ++matchlen) {
+ if ((*matchptr == '\0') ||
+ (slash && ((*matchptr == '/') ||
+ (escape && (*matchptr == '\\') &&
+ (matchptr[1] == '/'))))) {
+ /* Compare precisely this many
+ * trailing string chars, the
+ * resulting match needs no
+ * wildcard loop.
+ */
+ /* XXX: Adjust for MBCS */
+ if (string + matchlen > strendseg)
+ return FNM_NOMATCH;
+
+ string = strendseg - matchlen;
+ wild = 0;
+ break;
+ }
+
+ if (*matchptr == '*') {
+ /*
+ * Ensure at least this many
+ * trailing string chars remain
+ * for the first comparison.
+ */
+ /* XXX: Adjust for MBCS */
+ if (string + matchlen > strendseg)
+ return FNM_NOMATCH;
+
+ /*
+ * Begin first wild comparison
+ * at the current position.
+ */
+ break;
+ }
+
+ /*
+ * Skip forward in pattern by a single
+ * character match Use a dummy
+ * fnmatch_ch() test to count one
+ * "[range]" escape.
+ */
+ /* XXX: Adjust for MBCS */
+ if (escape && (*matchptr == '\\') &&
+ matchptr[1]) {
+ matchptr += 2;
+ } else if (*matchptr == '[') {
+ dummyptr = dummystring;
+ fnmatch_ch(&matchptr, &dummyptr,
+ flags);
+ } else {
+ ++matchptr;
+ }
+ }
+ }
+
+ /* Incrementally match string against the pattern. */
+ while (*pattern && (string < strendseg)) {
+ /* Success; begin a new wild pattern search. */
+ if (*pattern == '*')
+ break;
+
+ if (slash && ((*string == '/') ||
+ (*pattern == '/') || (escape &&
+ (*pattern == '\\') && (pattern[1] == '/'))))
+ break;
+
+ /*
+ * Compare ch's (the pattern is advanced over
+ * "\/" to the '/', but slashes will mismatch,
+ * and are not consumed).
+ */
+ if (!fnmatch_ch(&pattern, &string, flags))
+ continue;
+
+ /*
+ * Failed to match, loop against next char
+ * offset of string segment until not enough
+ * string chars remain to match the fixed
+ * pattern.
+ */
+ if (wild) {
+ /* XXX: Advance 1 char for MBCS locale */
+ string = ++strstartseg;
+ if (string + matchlen > strendseg)
+ return FNM_NOMATCH;
+
+ pattern = mismatch;
+ continue;
+ } else
+ return FNM_NOMATCH;
+ }
+ }
+
+ if (*string && !((slash || leading_dir) && (*string == '/')))
+ return FNM_NOMATCH;
+
+ if (*pattern && !(slash && ((*pattern == '/') ||
+ (escape && (*pattern == '\\') && (pattern[1] == '/')))))
+ return FNM_NOMATCH;
+
+ if (leading_dir && !*pattern && *string == '/')
+ return 0;
+ }
+
+ /* Where both pattern and string are at EOS, declare success. */
+ if (!*string && !*pattern)
+ return 0;
+
+ /* Pattern didn't match to the end of string. */
+ return FNM_NOMATCH;
+}
diff --git a/openbsd-compat/fnmatch.h b/openbsd-compat/fnmatch.h
new file mode 100644
index 00000000..4b27d06c
--- /dev/null
+++ b/openbsd-compat/fnmatch.h
@@ -0,0 +1,57 @@
+/* $OpenBSD: fnmatch.h,v 1.8 2005/12/13 00:35:22 millert Exp $ */
+/* $NetBSD: fnmatch.h,v 1.5 1994/10/26 00:55:53 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)fnmatch.h 8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _FNMATCH_H_
+#define _FNMATCH_H_
+
+#include <sys/cdefs.h>
+
+#define FNM_NOMATCH 1 /* Match failed. */
+#define FNM_NOSYS 2 /* Function not supported (unused). */
+
+#define FNM_NOESCAPE 0x01 /* Disable backslash escaping. */
+#define FNM_PATHNAME 0x02 /* Slash must be matched by slash. */
+#define FNM_PERIOD 0x04 /* Period must be matched by period. */
+#if __BSD_VISIBLE
+#define FNM_LEADING_DIR 0x08 /* Ignore /<tail> after Imatch. */
+#define FNM_CASEFOLD 0x10 /* Case insensitive search. */
+#define FNM_IGNORECASE FNM_CASEFOLD
+#define FNM_FILE_NAME FNM_PATHNAME
+#endif
+
+__BEGIN_DECLS
+int fnmatch(const char *, const char *, int);
+__END_DECLS
+
+#endif /* !_FNMATCH_H_ */
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